Kohaku has located the treasure left behind by Byakuya and the others, but it's encased in concrete. Senku has to devise a plan to quietly get at the contents inside, so as to not alert the guards.
Nitric acid.
.حمض النتريك
Salpetersäure.
el ácido nítrico.
el ácido nítrico.
De l’acide nitrique.
L'acido nitrico.
Ácido nítrico.
Азотная кислота.